QuestionYa it's Multi port, 2 fuel rails 6 fuel injectors and so on so I think I am just going to send it to a garage. Thanks for all your help but I think it's time to throu in the towel on it.
Cap
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Followup To
Question -
Tested fuel press and it's at 45 PSI all the time the engine is fuel inj'ed.
Cap
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Followup To
Question -
Ok so I checked the EGR and it was clean so I bought a code checker. Got codes for the TPS and MAP so I replaced them and the same thing. Checked the fuel press and it was low so I replaced the pump and same thing. One thing I did notice if I cycle the key a couple of times say to try and build up press I only hear the pump the first time I turn the key. If I let it sit for a sec and try it again it runs the first time and thats it.
Cap
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With everything pluged in the car starts and dies right away, but if I disconect the three prong plug at the ALT it runs but like crap. Any help would be great.
Thx,
Cap
Answer -
Hi Cap,
Sounds like it barely wants to run, and the extra load of the alternator is just too much for it at that time.
I would look for a vacuum leak.
The EGR valve sitting on some carbon would cause it to act just like that. Remove it and clean it.
Brake vacuum booster is another source of vacuum leaks.
Assuming vacuum isn't the problem, fuel pressure would be the next thing I would check.
Van
Answer -
After replacing the pump, was the fuel pressure still low?
The single cycle of the fuel pump is ok. But with the fuel pressure tester connected, the pressure should go to about 13 PSI, and all during the cranking, starting, and running periods, should STAY at 13 PSI, or close to it.
If the pressure drops after the initial jump, then fuel pump relay, or crank sensor would be suspect.
Van
Answer -
88 Cutlass, if I am not mistaken, has Throttle Body Injection, and therefore, the fuel pressure should be 13 PSI. 45 would be way too high.
Make sure you got the correct pump for your engine.
Of course, if you have Sequential Fuel Injection, or Multi Port Fuel Injection, the pressure is higher, But I don't think so on a 88.
Van
AnswerCool, multiport in an 88.
Try one more thing.\
You mentioned a MAP code.
MAP is manifold absolute pressure, which is vacuum.
That code could be because it is actually measuring low vacuum.
The EGR valve, if sticking open, could cause that.
But there are a few more things.
A leak in the brake booster, loosing a large amount of vacuum.
A PCV valve stuck open.
A split vacuum hose.
A leak in the heater/ac vacuum system.
A leak in the intake manifold gasket.
A leak in the transmission vacuum modulator valve if it has one.
A plugged exhaust system.
Or, an electrical problem dropping the voltage to the distributor. Measure it, or try a jumper wire from the battery.
A missing ground from the engine to the firewall could also do it, as well as a bad ignition switch. Measure voltage to the distributor.
Guess that was more than one more thing, but hopefully something can save you some money.
Van
